Patent US2613572A successfully refreshed from Google Patents.
US2794785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anion-exchange resins cross linked with polyester of unsaturated polycar-boxylic acid
Assignee: Beazer East Inc
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Filing: 1953-03-23
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Granted: 1957-06-04
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Expires: 1973-03-23
Abstract
No abstract record available.
Inventors
- 👤 Alelio Gaetano F D
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:10
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
AN INSOLUBLE, INFUSIBLE RESIN COMPRISING A COPOLYMER HAVING A PLURALITY OF REPEATING UNITS HAVING THE STRUCTURE
Claim 2
Dependent Claim
16 words
AN INSOLUBLE, INFUSIBLE RESIN COMPRISING A COPOLYMER HAVING A PLURALITY OF REPEATING UNITS HAVING THE STRUCTURE
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-03 | 1960-12-03 | 1961-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-03 | 1964-12-03 | 1965-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-03 | 1968-12-03 | 1969-06-04 | $7700.00 | Window Closed / Lapsed |